CVE-2025-68307

CAN transmission stoppage via failed URB cleanup

Published Dec 16, 2025 · Updated Dec 16, 2025

Resource exhaustion in the Linux kernel gs_usb driver allows local users to stop CAN transmission by causing failed USB bulk transfers. gs_usb_xmit_callback() fails to release the echo slot and driver context or restore URB accounting when usb_submit_urb() fails. Each failure removes one transmit URB from service, so repeated errors degrade throughput until the CAN send queue can no longer transmit.

CVSS severity5.8
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in the Linux kernel gs_usb driver allows local users to stop CAN transmission by causing failed USB bulk transfers. gs_usb_xmit_callback() fails to release the echo slot and driver context or restore URB accounting when usb_submit_urb() fails. Each failure removes one transmit URB from service, so repeated errors degrade throughput until the CAN send queue can no longer transmit.

The record

CVE
CVE-2025-68307
Published
Dec 16, 2025
Updated
Dec 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.16
  2. Affected versionversion=d08e973a77d128b25e01a08c34d89593fdf222da <1a588c40a422a3663a52f1c5535e8fb6b044167d
  3. Affected versionversion=d08e973a77d128b25e01a08c34d89593fdf222da <4a82072e451eacf24fc66a445e906f5095d215db
  4. Affected versionversion=d08e973a77d128b25e01a08c34d89593fdf222da <516a0cd1c03fa266bb67dd87940a209fd4e53ce7
  5. Affected versionversion=d08e973a77d128b25e01a08c34d89593fdf222da <9c8eb33b7008178b6ce88aa7593d12063ce60ca3
  6. Affected versionversion=d08e973a77d128b25e01a08c34d89593fdf222da <f7a5560675bd85efaf16ab01a43053670ff2b000

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.16; version=d08e973a77d128b25e01a08c34d89593fdf222da <1a588c40a422a3663a52f1c5535e8fb6b044167d; version=d08e973a77d128b25e01a08c34d89593fdf222da <4a82072e451eacf24fc66a445e906f5095d215db; version=d08e973a77d128b25e01a08c34d89593fdf222da <516a0cd1c03fa266bb67dd87940a209fd4e53ce7; version=d08e973a77d128b25e01a08c34d89593fdf222da <9c8eb33b7008178b6ce88aa7593d12063ce60ca3; version=d08e973a77d128b25e01a08c34d89593fdf222da <f7a5560675bd85efaf16ab01a43053670ff2b000

Published CVSS scores

5.3SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
5.5OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.8SUSECVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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